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  1. numericaleng

    ETABS API add new mass source

    Hello, I created a program with using visual studio VBA, but I could not add "NEW" mass source. One of the collegue said to me: you should use a different system and library but I could not find anyway. I would be appriate if you help me. NOTE : cPropMaterial.SetMassSource_1 Method could not...
  2. numericaleng

    Converting 5% damped response spectrum to 2% & 0.5% damping

    I am designing a water storage tank and I need to convert my elastic response spectrum's damping ratio 5% to 2% & 0.5%. Could you please help me how can i convert it? If I have a time history data, I can derive it to other thinks (PSA, PSV, PSD, SA, Displacement charts etc.) . But I did not...
  3. numericaleng

    ASCE 41-17 STEEL COLUMN HINGE

    Hi all, I am studying about performance analysis, and confused a point about ASCE 41-17 steel column hinge properties. When I calculate the yield rotation according to Eq. 9-2, I obtain 0.00776 but SAP2000 show 0.006378 (L=3 m; HEB400; S355). The interaction curve definitions (P, M3 etc.)...

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